Tesla Powerwall 2 Owners

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196 posts

Master Geek

#1999936 20-Apr-2018 17:35

SQLGeek:

Finally received my Powerwall 2 quote, 3 weeks after the onsite inspection. $14,155 installed.

I have decided NOT to proceed, mainly as Tesla has not yet released the firmware update that allows the battery to be topped up from the grid off peak. I just don't have enough spare solar to justify it, I wouldn't fill the battery until late spring!

Did they mention any problems with the 3 phase power particularly with the battery backup - My understanding was for the tesla power wall to work correctly/fully on 3 phase - you had to get 3 of them - 1 for each phase

SQLGeek

135 posts

Master Geek

#2000260 21-Apr-2018 11:43

humvee:

SQLGeek:

Finally received my Powerwall 2 quote, 3 weeks after the onsite inspection. $14,155 installed.

I have decided NOT to proceed, mainly as Tesla has not yet released the firmware update that allows the battery to be topped up from the grid off peak. I just don't have enough spare solar to justify it, I wouldn't fill the battery until late spring!

Did they mention any problems with the 3 phase power particularly with the battery backup - My understanding was for the tesla power wall to work correctly/fully on 3 phase - you had to get 3 of them - 1 for each phase

No issue with 3 phase power, the Powerwall 2 supports 3 phase

RUKI

1402 posts

Uber Geek

#2005361 30-Apr-2018 17:51

SQLGeek:

Finally received my Powerwall 2 quote, 3 weeks after the onsite inspection. $14,155 installed.

I have decided NOT to proceed, mainly as Tesla has not yet released the firmware update that allows the battery to be topped up from the grid off peak.....

That is AFAIK has nothing to do with Tesla (I have PowerWall) or any other back up battery you install for your solar. Smarts are in the control board of Invertor (e.g. SolarEdge or similar). And there are various possible settings, just by reading the Service Manual from S.E.: what would be the source and schedule of your back up battery charge - Solar, Wind, Water Turbine or Grid.

As for me - if anyone came across results of deciphering the protocol between PowerWall and Inverter - would be keen to hear. That may help to build much better application and extra smarts (to trigger external devices) vs what is currently available (simplistic consumer-oriented interface).

Toyota / Lexus Hybrid and EV Battery Expert Battery Test & Repair

SQLGeek

135 posts

Master Geek

#2009606 7-May-2018 20:58

RUKI:

SQLGeek:

Finally received my Powerwall 2 quote, 3 weeks after the onsite inspection. $14,155 installed.

I have decided NOT to proceed, mainly as Tesla has not yet released the firmware update that allows the battery to be topped up from the grid off peak.....

That is AFAIK has nothing to do with Tesla (I have PowerWall) or any other back up battery you install for your solar. Smarts are in the control board of Invertor (e.g. SolarEdge or similar). And there are various possible settings, just by reading the Service Manual from S.E.: what would be the source and schedule of your back up battery charge - Solar, Wind, Water Turbine or Grid.

As for me - if anyone came across results of deciphering the protocol between PowerWall and Inverter - would be keen to hear. That may help to build much better application and extra smarts (to trigger external devices) vs what is currently available (simplistic consumer-oriented interface).

Tesla told me that they are rolling this out in batches in Australia now and it should have details for NZ around Q4. Tesla call it Time of Use software.

RUKI

1402 posts

Uber Geek

#2010141 8-May-2018 17:08

SQLGeek:...

Tesla told me that they are rolling this out in batches in Australia now and it should have details for NZ around Q4. Tesla call it Time of Use software.

SolarEdge Software has various adjustable profiles, including scheduling. Unfortunately Vector did not allow access to the Admin part of the Inverter.

Toyota / Lexus Hybrid and EV Battery Expert Battery Test & Repair

kingdragonfly

11209 posts

Uber Geek

Subscriber

#2010178 8-May-2018 18:22

Solaredge LAN uses port 502 by default.

You can hook it up directly to a PC, and use Wireshark to find the IP address.

You'll see ARP packets that will clearly have the IP address.

Change your PC's static IP range to fit within the range, usually just add or subtract 1 from the one you found.

I've read the password used to start as "1234".

I'd try a simple dictionary attack. I'd bet it's something stupid and easy to remember.

kingdragonfly

11209 posts

Uber Geek

Subscriber

#2010333 8-May-2018 21:17

Looks like most Solaredge passwords are just 7 to 8 numbers

Quic Broadband

Move to New Zealand's best fibre broadband service (affiliate link). Free setup code: R587125ERQ6VE. Note that to use Quic Broadband you must be comfortable with configuring your own router.

SQLGeek

135 posts

Master Geek

#2016127 15-May-2018 09:01

More information on the firmware upgrade that lets you make use of off peak rates

https://electrek.co/2018/05/13/tesla-releases-powerwall-2-update/

kingdragonfly

11209 posts

Uber Geek

Subscriber

#2024016 28-May-2018 16:28

"Tesla solar and Powerwall keep the lights on during Puerto Rico power outage"

https://electrek.co/2018/05/24/tesla-solar-roof-powerwall-keep-the-lights-on-puerto-rico-power-outage/

"Ever since the island of Puerto Rico’s power grid was destroyed by hurricanes last year, power outages have plagued the island.

Tesla has been focusing on deploying solar and energy storage on the island in order to help get power back to more people quicker.

One homeowner with a Tesla Powerwall and solar array shows how it can keep the lights on and run off-grid during outages.

After Puerto Rico was ravaged by hurricanes last year, most of the island’s population lost power for an extended period of time as the grid was badly damaged.

While power slowly came back online over the last few months, they still have been having issues and last month, the entire power grid went down again for virtually everyone on the Puerto Rican Electric Power grid.

..."

delebru

15 posts

Geek

#2058104 18-Jul-2018 08:57

SQLGeek:

Finally received my Powerwall 2 quote, 3 weeks after the onsite inspection. $14,155 installed.

I have decided NOT to proceed, mainly as Tesla has not yet released the firmware update that allows the battery to be topped up from the grid off peak. I just don't have enough spare solar to justify it, I wouldn't fill the battery until late spring!

Would you be able to say with which company gave you that quote? Because Tesla doesn't do the installations directly, they work with various partners and the one they sent us quoted $15.499 for the first powerwall with the gateway, and $14.000 for each additional powerwall. Which I thought it was quite absurd compared to the prices on Tesla's website, and now even more absurd when I see the quote you got :O

FineWine

2984 posts

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Nurse (R)

Lifetime subscriber

#2058270 18-Jul-2018 11:08

delebru:

SQLGeek:

Finally received my Powerwall 2 quote, 3 weeks after the onsite inspection. $14,155 installed.

I have decided NOT to proceed, mainly as Tesla has not yet released the firmware update that allows the battery to be topped up from the grid off peak. I just don't have enough spare solar to justify it, I wouldn't fill the battery until late spring!

Would you be able to say with which company gave you that quote? Because Tesla doesn't do the installations directly, they work with various partners and the one they sent us quoted $15.499 for the first powerwall with the gateway, and $14.000 for each additional powerwall. Which I thought it was quite absurd compared to the prices on Tesla's website, and now even more absurd when I see the quote you got :O

Did you calculate how long it would take to pay itself off based on savings you would make on electricity usage ? If so how long and what levels of usage do you have ? Does the Tesla Powerwall 2 price include the solar panels ?

Whilst the difficult we can do immediately, the impossible takes a bit longer. However, miracles you will have to wait for.

wellygary

8335 posts

Uber Geek

#2058277 18-Jul-2018 11:20

FineWine:

Does the Tesla Powerwall 2 price include the solar panels ?

Nope, PW2 NZD list price is $10,850 (exl install)

https://www.tesla.com/en_NZ/powerwall?redirect=no

tdgeek

29753 posts

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#2058280 18-Jul-2018 11:36

FineWine:

Did you calculate how long it would take to pay itself off based on savings you would make on electricity usage ?

I think they are 13.5kWh?

If you got them charged for free by solar every day, thats 13.5 kWh per day x 25c x 365 days = $1230 per year savings.

But it wont be anywhere near that as you wont get sunny days every day, and there are non optimal winter days. So annecdotally say it saves $500 per year. Thats 30 years payback. You can charge them offpeak, sure, but you can get offpeak prices without buying a battery.

delebru

15 posts

Geek

#2058377 18-Jul-2018 15:49

tdgeek:

If you got them charged for free by solar every day, thats 13.5 kWh per day x 25c x 365 days = $1230 per year savings.

That's a good simple reference but still quite vague... You're not considering how much you spent on a solar installation, nor how much you're paying for the electricity from the grid... It is not a directional calculation to know how much a battery makes you save, but it will definitely help with reducing grid power usage if you spend most of the daytime out of your home when your solar panels will be generating electricity.

Other factors to consider: 10% energy is lost from the panels to the battery, then other 10% is lost from the battery to your house. The actual warranty sheet suggests the Powerwall 2 has 13.2 kWh capacity and has a 10 year warranty with up to 70% degradation: https://www.tesla.com/sites/default/files/pdfs/powerwall/Powerwall_2_AC_Warranty_AUS-NZ_1-0.pdf

tdgeek

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#2058431 18-Jul-2018 18:49

delebru:

tdgeek:

If you got them charged for free by solar every day, thats 13.5 kWh per day x 25c x 365 days = $1230 per year savings.

That's a good simple reference but still quite vague... You're not considering how much you spent on a solar installation, nor how much you're paying for the electricity from the grid... It is not a directional calculation to know how much a battery makes you save, but it will definitely help with reducing grid power usage if you spend most of the daytime out of your home when your solar panels will be generating electricity.

Other factors to consider: 10% energy is lost from the panels to the battery, then other 10% is lost from the battery to your house. The actual warranty sheet suggests the Powerwall 2 has 13.2 kWh capacity and has a 10 year warranty with up to 70% degradation: https://www.tesla.com/sites/default/files/pdfs/powerwall/Powerwall_2_AC_Warranty_AUS-NZ_1-0.pdf

Yes, it was simplistic. BUT. If you have solar PV you need to be timeshifting, so being at work isnt going to be devoted to the battery. Your dishwasher will be going, as will the washing machine, as will pre heat the house or pre cool it. Hot water will be on during the day and off at night. Plus the fridge, freezer, standbys. Plus you should use a slow cooker, or do the roast all day at 120C to maximise solar.

A battery seems too tough to justify right now. There has been talk of suing your EV as a battery. Ive researched that, it doesnt work. EV batteries are designed to be charged and used over the mileage, not on and off as a pseudo home battery, that reduces the lifespan. Its not like phones where 5 full charges is no different to 20 quarter charges.

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